spring纯注解的account案例

dao层：

package cn.mepu.dao.imp;

import cn.mepu.dao.IAccountDao;
import cn.mepu.domain.Account;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Repository;

import java.util.List;

/**
 * @author shkstart
 * @create 2019-11-10 16:09
 */
@Repository("accountDao")
public class AccountDaoImp implements IAccountDao {

    @Autowired
    private JdbcTemplate jdbcTemplate;
    public Account findAccountById(Integer accountId) {
        List<Account> accounts = jdbcTemplate.query("select * from account where id = ?",new BeanPropertyRowMapper<Account>(Account.class),accountId);
        return accounts.isEmpty()?null:accounts.get(0);
    }

    public Account findAccountByName(String accountName) {
        List<Account> accounts = jdbcTemplate.query("select * from account where name = ?",new BeanPropertyRowMapper<Account>(Account.class),accountName);
        if(accounts.isEmpty()){
            return null;
        }
        if(accounts.size()>1){
            throw new RuntimeException("结果集不唯一");
        }
        return accounts.get(0);
    }

    public void updateAccount(Account account) {
        jdbcTemplate.update("update account set name=?,money=? where id=?",account.getName(),account.getMoney(),account.getId());

    }

}

service层：

package cn.mepu.service.impl;

import cn.mepu.dao.IAccountDao;
import cn.mepu.domain.Account;
import cn.mepu.service.IAccountService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;

/**
 * @author shkstart
 * @create 2019-11-11 8:43
 */
@Service("accountService")
@Transactional(propagation = Propagation.SUPPORTS,readOnly=true)//只读配置
public class AccountServiceImpl implements IAccountService {

    @Autowired
    private IAccountDao accountDao;

    @Override
    public Account findAccountById(Integer accountId) {
        return accountDao.findAccountById(accountId);
    }

    @Transactional(propagation = Propagation.REQUIRED,readOnly=false)//只读配置
    public void transfer(String sourceName, String targetName, float money) {
        //2.1根据名称查询转出账户
        Account source = accountDao.findAccountByName(sourceName);
        //2.2根据名称查询转入账户
        Account target = accountDao.findAccountByName(targetName);
        //2.3转出账户减钱
        source.setMoney(source.getMoney()-money);
        //2.4转入账户加钱
        target.setMoney(target.getMoney()+money);
        //2.5更新转出账户
        accountDao.updateAccount(source);
//                int i=1/0;
        //2.6更新转入账户
        accountDao.updateAccount(target);
    }
}

配置文件：

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/javaee
jdbc.username=root
jdbc.password=root

spring配置类：

package cn.config;

import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Import;
import org.springframework.context.annotation.PropertySource;
import org.springframework.transaction.annotation.EnableTransactionManagement;

/**
 * @author shkstart
 * @create 2019-11-11 10:52
 * spring的配置类
 */
@Configuration
@ComponentScan("cn.mepu")
@Import({JdbcConfig.class,TransactionConfig.class})
@PropertySource("jdbcConfig.properties")
@EnableTransactionManagement
public class SpringConfiguration {
}

事务相关配置类;

package cn.config;

import org.springframework.context.annotation.Bean;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import org.springframework.transaction.PlatformTransactionManager;

import javax.sql.DataSource;

/**
 * @author shkstart
 * @create 2019-11-11 11:12
 * 和事务相关的配置类
 */
public class TransactionConfig {

    /**
     * 创建事务管理器对象
     * @param dataSource
     * @return
     */
    @Bean("transactionManager")
    public PlatformTransactionManager createTransactionManager(DataSource dataSource){
        return new DataSourceTransactionManager(dataSource);
    }
}

连接数据库相关的配置类：

package cn.config;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.datasource.DriverManagerDataSource;

import javax.sql.DataSource;

/**
 * @author shkstart
 * @create 2019-11-11 10:55
 * 连接数据库相关的配置类
 */
public class JdbcConfig {
    @Value("${jdbc.driver}")
    private String driver;
    @Value("${jdbc.url}")
    private String url;
    @Value("${jdbc.username}")
    private String username;
    @Value("${jdbc.password}")
    private String password;

    /**
     * 创建jdbcTemplat容器
     * @param dataSource
     * @return
     */
    @Bean(name = "jdbcTemplate")
   public JdbcTemplate createJdbcTemplate(DataSource dataSource){
        return new JdbcTemplate(dataSource);
    }

    /**
     * 创建数据源对象
     * @return
     */
    @Bean(name={"dataSource"})
    public DataSource createDataSource(){
        DriverManagerDataSource ds = new DriverManagerDataSource();
        ds.setDriverClassName(driver);
        ds.setUrl(url);
        ds.setUsername(username);
        ds.setPassword(password);
        return ds;
    }
}

测试类：

package cn.mepu;

import cn.config.SpringConfiguration;
import cn.mepu.service.IAccountService;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

/**
 * @author shkstart
 * @create 2019-11-11 8:51
 */

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes = SpringConfiguration.class)
public class TestAccount {
    @Autowired
    private  IAccountService as;

    @Test
    public  void testTransfer(){
        as.transfer("aaa","bbb",100f);

    }

}